+ if (screen->pitch == SCREEN_WIDTH * 4) {
+ SDL_LockSurface(screen);
+ mainscreen->draw((unsigned char *)screen->pixels, SCREEN_WIDTH, SCREEN_HEIGHT);
+ SDL_UnlockSurface(screen);
+ } else {
+ mainscreen->draw(framebuf, SCREEN_WIDTH, SCREEN_HEIGHT);
+ SDL_LockSurface(screen);
+ for (unsigned y = 0; y < SCREEN_HEIGHT; ++y) {
+ unsigned char *sptr = framebuf + y * SCREEN_WIDTH * 4;
+ unsigned char *dptr = (unsigned char *)screen->pixels + y * screen->pitch;
+ memcpy(dptr, sptr, SCREEN_WIDTH * 4);
+ }
+ SDL_UnlockSurface(screen);
+ }
+ SDL_Flip(screen);